Safety-envelop.



F. MARTHAY.

SAFETY ENVELOP.

APPLICATION FILED JAN. 14. 1919.

1,318,895. Patented Oct. 14,1919.

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F. MARTHAY. SAFETY ENVELOP.

APPLICATION FILED JAN. I4. 1919- 1,318,895. Patented Oct. 14,1919.

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SAFETY-ENVELOP.

Specificationof Iletters Z Patent. Patei fed Application filed January14, 1919. Serial No. 271,034.

To all whom it may concern:

Be it known that I, FRANK MARTHAY, a citizen of the United States,residing at Osaka, in the county of Wise and State of Virginia, haveinvented new and useful Improvements in Safety-Envelops, of which thefollowing is a specification.

This invention relates to new andnseful improvements in envelops and theprlncipal object of the invention is to provide means for securelyholding the envelop in closed position and also to provide means forsealing a portion of the flap to the letter to indicate whether or notsaid envelop has been tampered with by any unauthorized person.

Another object of the invention is to provide a device of this characterwhich is simple and durable in construction, reliable and eflicient inoperation and one which can be manufactured and placed upon the marketat a minimum cost.

The invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1shows the blank from which the envelop is formed with the adhesivematerial in place thereon.

Fig. 2 is a view with the end flaps closed and the other flaps open.

Fig. 3 is a view with the bottom flap closed and the extension flap inturningover position.

Fig. 4 is a view of the closed envelop.

Fig. 5 is a section on line 5-5 of Fig. 4.

As shown in these views the envelop consists of a body 1, the end flaps2, the lower flap 3, the top flap 4 and the extension flap 5 which isconnected with the top flap. One of the end flaps is provided with aslot 6 while the other end flap has a pair of slits extending inwardlyfrom its free end to form a tongue 7 which is adapted to be passedthrough said slot 6. These two flaps are held together by this tongueand the adhesive, as indicated. After these ends are connected togetherthe bottom flap is folded over and gummed to these flaps. The extensionflap is connected with the edge of the top flap, as shown, and at thepoint of connection a crease is formed so that the extension flap may befolded upon the inner face of the top flap. The extreme end of theextension flap is provided with a line of perforations as at 8. Theinner face of the strip 9 formed by this line of perforations is coveredwith adhesive, as shown, so that this strip may be gummed to the letteror contents of the envelop. The outer face of said extension flap at theend thereof beginning at a point marked 10 and extending through to theline of perforations is also covered with adhesive. A crease 11 isformed midway of this adhesive coated part just mentioned so that thiscreased line may be folded over when the upper flap 4: is folded. Afterthe envelop is formed and the letter. or contents inserted the adhesiveon the strip 9 is moistened and the extension flap folded over and thisstrip pasted to the letter. The adhesive, above the line 10, ismoistened as is also the adhesive on the side edges of the top flap 4:and then this top flap with the extension flap folded over on to therest of the envelop. This will cause the side edges of the top flap tostick to the body of the envelop while the adhesive above the line 10will stick to the top edge of the end flaps and thus securely hold theenvelop closed. When the envelop is opened in removing the letter thestrip 9 will be torn on the perforated line so that this strip willremain on the letter.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claim.

What I claim is An envelop having an extension flap on its top flap, astrip at the extreme end of said extension flap separated therefrom by aline of perforations, said strip being gunnned on its inner face forattachment to the inclosure and the extension flap below said striphaving a coating of'adhesive on its outer face and a crease extendingacross said coated part of the flap, said adhesive being attached to theend flaps after the extension flap is folded upon the top flap previousto closing the envelop by folding H] the top flap upon the other flaps.

In testimony whereof I affix my signature.

FRANK MARTHAY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

7 Washington, I). G.

